CN213045359U - Breathing protective mask - Google Patents

Abstract

The application provides a respiratory protection mask, which comprises a mask, an air inlet box assembly and an air outlet box assembly; the mask is made of transparent materials and surrounds the face of a user to form a breathing cavity after being worn; the air inlet box assembly is arranged on the mask and comprises a first box body, a first filter sheet and a first centrifugal fan, wherein the first filter sheet and the first centrifugal fan are both arranged in the first box body; the air outlet box assembly is arranged on the mask and is spaced from the air inlet box assembly, the air outlet box assembly comprises a second box body, a second filter sheet and a second centrifugal fan, the second filter sheet and the second centrifugal fan are both arranged in the second box body, and the second centrifugal fan is arranged on the outer side, away from the mask, of the second filter sheet; the outside air enters the breathing cavity after being sequentially filtered by the first filtering piece and pressurized by the first centrifugal fan, and the air in the breathing cavity is sequentially discharged out of the second box body through the second filtering piece and the second centrifugal fan. The application provides a respiratory protection gauze mask can increase the breathing comfort level of gauze mask.

Description

Breathing protective mask

Technical Field

The application belongs to the technical field of medical protection devices, and particularly relates to a breathing protective mask.

Background

In the current medical field, particularly in the medical activities related to epidemic prevention, in order to ensure the safety of medical staff and avoid the infection of microorganisms such as viruses, the medical staff usually need to wear thick protective clothing and work with thick medical protective masks and protective goggles. Under this kind of safeguard measure, medical personnel's breathing and activity etc. all received very big influence, especially after they wear medical protective facial mask, not only can influence normal interchange, and current medical protective facial mask is all thicker moreover, and it is lower to wear the back breathing comfort level, very easily appears breathing discomfort such as oppression.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of this application is to provide a respiratory protection mask to breathe the lower technical problem of comfort level when solving the gauze mask that exists among the prior art and using.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a respiratory protection mask comprising:

the mask is made of transparent materials, and the mask is surrounded with the face of a user to form a breathing cavity after being worn;

the air inlet box assembly is arranged on the mask and comprises a first box body, a first filter sheet and a first centrifugal fan, the first filter sheet and the first centrifugal fan are both arranged in the first box body, and the first centrifugal fan is arranged on the inner side, facing the mask, of the first filter sheet; and the number of the first and second groups,

the air outlet box assembly is arranged on the mask and is spaced from the air inlet box assembly, the air outlet box comprises a second box body, a second filter sheet and a second centrifugal fan, the second filter sheet and the second centrifugal fan are both arranged in the second box body, and the second centrifugal fan is arranged on the outer side, away from the mask, of the second filter sheet;

the outside air enters the breathing cavity after being sequentially filtered by the first filtering piece and pressurized by the first centrifugal fan, and the air in the breathing cavity is sequentially discharged out of the second box body through the second filtering piece and the second centrifugal fan.

Optionally, the inlet box assembly and the outlet box assembly are disposed on the left and right sides of the mask, and are disposed adjacent to the outer edge of the mask.

Optionally, the first box body is detachably and hermetically connected with the mask, and the first filter sheet is detachably mounted in the first box body; the second box body is also detachably and hermetically connected with the face mask, and the second filter sheet is also detachably arranged in the second box body.

Optionally, the first box body is provided with an air inlet cavity, an air inlet protective grid is arranged on an outer side plate of the first box body, an air inlet grid support is arranged on the face mask corresponding to the first box body, the outer edge of the first filter sheet is hermetically connected with the inner peripheral wall surface of the air inlet cavity and is adjacent to the air inlet protective grid, and the first centrifugal fan is arranged in the air inlet cavity and is positioned between the first filter sheet and the air inlet grid support;

the second box body has the chamber of giving vent to anger, is equipped with the protection grid of giving vent to anger on the lateral plate of second box body, corresponds second box body department on the face guard and is equipped with the grid support of giving vent to anger, the outward flange of second cassette and the interior cliff side sealing connection who gives vent to anger the chamber to neighbouring grid support of giving vent to anger, place in the chamber of giving vent to anger in the second centrifugal fan, and lie in the second cassette and give vent to anger between the protection grid.

Optionally, the air intake box assembly further comprises a first air intake fiber felt, a second air intake fiber felt and a porous insulating gasket, the first air intake fiber felt is arranged between the first filter sheet and the air intake protective grid, the insulating gasket is clamped between the first air intake fiber felt and the first filter sheet, and the second air intake fiber felt is arranged between the first filter sheet and the first centrifugal fan;

stainless steel frameworks are arranged in the first air inlet fiber felt and the second air inlet fiber felt, the first air inlet fiber felt is provided with positive direct-current electrostatic voltage smaller than human body safety voltage, and the second air inlet fiber felt is provided with negative direct-current electrostatic voltage smaller than human body safety voltage.

Optionally, the air intake box assembly further comprises a first pressure sensor disposed in the air intake cavity and adjacent to the air intake grille support; the air outlet box assembly further comprises a second pressure sensor, and the second pressure sensor is arranged in the air outlet cavity and is positioned between the second centrifugal fan and the second filter sheet.

Optionally, respiratory protection mask still includes the straw subassembly, and the straw subassembly includes the straw and the soft connecting pipe of stereoplasm, and during straw one end was worn to establish the face guard and is stretched into respiratory cavity, the other end and the connecting pipe sealing connection of straw, the straw was sealed the setting with the junction of face guard.

Optionally, the suction tube assembly further comprises a leak-proof mouthpiece and an aseptic connector, the leak-proof mouthpiece is connected with one end of the suction tube extending into the breathing cavity, and the aseptic connector is connected with the other end of the connecting tube far away from the mask.

Optionally, a sealing rubber strip is arranged on the inner side surface of the mask adjacent to the outer edge, and the length extension direction of the sealing rubber strip is consistent with the outer edge of the mask.

Optionally, the mask is made of transparent polycarbonate material by integral molding.

The application provides a respiratory protection mask's beneficial effect lies in: compared with the prior art, the breathing protective mask is provided with the air inlet box assembly and the air outlet box assembly at intervals, so that when the breathing protective mask is actually used, external air can sequentially pass through the first filter element to filter microorganisms, and then enters the breathing cavity after being pressurized by the first centrifugal fan so as to be inhaled by a mask user; after the gauze mask user exhales waste gas to the breathing cavity in, the air in the breathing cavity can pass through second cassette and second centrifugal fan discharge second box body in proper order. Because the air flow in the breathing cavity of the mask after being pressurized by the first centrifugal fan is slightly larger than the normal breathing flow, the air inlet box assembly can ensure that a user of the mask can smoothly breathe fresh air after microorganisms are filtered; and the exhaust gas exhaled by the human body can be quickly exhausted under the suction action of the second centrifugal fan on the outer side of the second filter element after passing through the second filter element. Like this, through the mutually supporting of face guard, the box subassembly of admitting air and the box subassembly of giving vent to anger, just can ensure that the atmospheric pressure in the breathing cavity in the gauze mask is slightly greater than ambient atmospheric pressure all the time, and then ensures the gauze mask user, for example medical personnel are unblocked when breathing in, can more smooth inhale filterable fresh air to in time discharge breathes waste gas, thereby reaches the purpose of increase gauze mask breathing comfort level.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a front view of a respiratory protection mask provided in accordance with an embodiment of the present application;

fig. 2 is a right side view of a respiratory protection mask provided in accordance with an embodiment of the present application;

FIG. 3 is a cross-sectional view of an air inlet box assembly of a respiratory protection mask provided in accordance with an embodiment of the present disclosure;

fig. 4 is a cross-sectional view of an outlet box assembly of a respiratory protection mask according to an embodiment of the present disclosure.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Breathing protective mask	110	Face mask
111	Breathing cavity	120	Air inlet box assembly
				121	First box body	122	The first filter plate
123	First centrifugal fan	130	Air outlet box assembly
				131	Second box body	132	Second filter sheet
133	Second centrifugal fan	124	Air inlet protective grille
				125	Air inlet grille support	134	Air outlet protection grid
135	Air outlet grille support	126	First air intake fiber felt
				127	Second air intake fiber felt	128	Insulating gasket
129	First pressure sensor	136	Second pressure sensor
				140	Suction pipe assembly	141	Suction tube
142	Connecting pipe	143	Leak-proof mouthpiece
				144	Aseptic connector	150	Sealing rubber strip
160	Tape	170	Power supply connection

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present application are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The embodiment of the application provides a breathing protective mask.

Referring to fig. 1 to 4, in one embodiment, the respiratory protection mask 100 includes a mask 110, an air inlet box assembly 120 and an air outlet box assembly 130. Wherein, the face mask 110 is made of transparent material, and the face mask 110 is surrounded with the face of the user to form a breathing cavity 111; the air inlet box assembly 120 is arranged on the face mask 110, the air inlet box assembly 120 comprises a first box body 121, a first filter sheet 122 and a first centrifugal fan 123, the first filter sheet 122 and the first centrifugal fan 123 are both arranged in the first box body 121, and the first centrifugal fan is arranged on the inner side of the first filter sheet 122 facing the face mask 110; the air outlet box assembly 130 is arranged on the face mask 110 and is spaced from the air inlet box assembly 120, the air outlet box assembly 130 comprises a second box body 131, a second filter sheet 132 and a second centrifugal fan 133, the second filter sheet 132 and the second centrifugal fan 133 are arranged in the second box body 131, and the second centrifugal fan is arranged on the outer side, away from the face mask 110, of the second filter sheet 132. In actual use, the external air is pressurized by the first filter member and the first centrifugal fan 123, and then enters the breathing cavity 111, and the air in the breathing cavity 111 is discharged out of the second box 131 by the second filter member 132 and the second centrifugal fan 133.

Based on the structural design, in the embodiment, since the air inlet box assembly 120 and the air outlet box assembly 130 are arranged on the mask 110 at intervals, during actual use, external air will sequentially pass through the first filter element to filter microorganisms, and then enter the breathing cavity 111 after being pressurized by the first centrifugal fan 123, so as to be inhaled by a user of the mask; when the user breathes out the air into the breathing cavity 111, the air in the breathing cavity 111 will be discharged out of the second box 131 through the second filter 132 and the second centrifugal fan 133 in sequence. Because the air flow rate in the breathing cavity 111 of the inlet mask after being pressurized by the first centrifugal fan 123 is slightly larger than the normal breathing flow rate, the air inlet box assembly 120 can ensure that a user of the mask can smoothly breathe fresh air after microorganisms are filtered; the exhaust air exhaled from the human body can be exhausted through the second filter member by the suction force of the second centrifugal fan 133 at the outer side of the second filter member. Therefore, the mutual matching of the mask 110, the air inlet box assembly 120 and the air outlet box assembly 130 can ensure that the air pressure in the breathing cavity 111 in the mask is slightly greater than the ambient air pressure all the time, so as to ensure that a mask user, such as medical personnel, is smooth and unobstructed when breathing in, can smoothly inhale filtered fresh air and timely discharge breathing waste gas, thereby achieving the purpose of increasing the breathing comfort level of the mask.

It should be noted that the respiratory protection mask 100 is mainly used in the medical protection field, so the filtering grade and filtering effect of the first filter 122 and the second filter 132 should meet the strictest medical mask standard, and the overall filtering efficiency of the whole mask to the microorganisms should meet the highest medical standard no matter whether the centrifugal fan is turned on or not. Of course, the respiratory protection mask 100 can also be used in other fields requiring respiratory protection, and at this time, only the filter meeting the corresponding standard needs to be replaced and the performance parameters of the corresponding components need to be adjusted.

Referring to fig. 1 and 2, it should be noted that, since many information is transmitted by facial expressions in human communication, the mask 110 is transparent in this application, which is advantageous for communication. Particularly, in the embodiment, the mask 110 is preferably made of a transparent polycarbonate material by integral molding, and the mask 110 made of the material has the advantages of lightness, high transparency, high temperature resistance and high temperature sterilization. Here, in order to improve the comfort and the sealing performance of the mask, a sealing strip 150 is disposed at a position where the face mask 110 is combined with the face, that is, at a position adjacent to the outer edge of the inner side of the face mask 110, the sealing strip 150 may be, but not limited to, a transparent silicone strip, and the like, and the length extending direction of the sealing strip 150 is consistent with the outer edge of the face mask 110, that is, except that the transparent silicone strip at the upper portion of the face mask 110 crosses the whole face at the position of the nose bridge, the transparent silicone strips at the left, right, and lower sides of the face mask 110 should extend in the circumferential direction of the outer edge of the face mask 110 as much as possible to wrap the whole face and be as close to the positions of the ears as much as possible, so that the transparent silicone strip. In addition, the entire chin should be covered under the mask 110 so that there is sufficient space to facilitate speaking and eating. Meanwhile, in order to ensure the tightness of the mask 110, the transparent silicone strip under the mask 110 should be positioned as close to the joint of the neck and the chin as possible because the movement range of the mouth is small in this region, so that the mask 110 is not prone to air leakage when the mouth moves.

Referring to fig. 1 and 2, in the present embodiment, the inlet box assembly 120 and the outlet box assembly 130 are disposed on the left and right sides of the mask 110, and are disposed adjacent to the outer edge of the mask 110. Thus, the air inlet box assembly 120 and the air outlet box assembly 130 do not shield the front face of the mask 110, which is beneficial to displaying the main expression area of the face as much as possible and facilitating information exchange. In addition, the inlet box assembly 120 and the outlet box assembly 130 are connected by wires that may be distributed along the edges of the mask 110 to avoid obscuring facial expressions.

Further, in the present embodiment, the first box 121 is detachably and hermetically connected to the mask 110, and the first filter 122 is detachably installed in the first box 121; the second container 131 is also detachably and hermetically connected to the mask 110, and the second filter 132 is also detachably installed in the second container 131. So, can conveniently admit air box subassembly 120 and the subsequent maintenance of the box subassembly 130 of giving vent to anger and change, certainly, after qualified disinfection, this respiratory protection gauze mask 100 can repetitious usage, and then the production of medical waste such as reducible disposable gauze mask, more is favorable to the environmental protection. In addition, because the mask 110 is relatively heavy, the respirator 100 should also be equipped with a soft, comfortable and bulky strap 160 for extended wear.

Referring to fig. 3 and 4, in the present embodiment, the first box 121 has an air inlet cavity, an air inlet protective grille 124 is disposed on an outer side plate of the first box 121, an air inlet grille support 125 is disposed on the mask 110 corresponding to the first box 121, an outer edge of the first filter 122 is hermetically connected to an inner peripheral wall surface of the air inlet cavity and is adjacent to the air inlet protective grille 124, and the first centrifugal fan 123 is disposed in the air inlet cavity and is located between the first filter 122 and the air inlet grille support 125. The second box 131 has an air outlet cavity, an air outlet protective grid 134 is arranged on the outer side plate of the second box 131, an air outlet grid support 135 is arranged on the face mask 110 corresponding to the second box 131, the outer edge of the second filter sheet 132 is connected with the inner peripheral wall surface of the air outlet cavity in a sealing manner and is adjacent to the air outlet grid support 135, and the second centrifugal fan 133 is arranged in the air outlet cavity and is positioned between the second filter sheet 132 and the air outlet protective grid 134. Here, in order to prevent microorganisms from entering the cassette, in the first cassette 121 and the second cassette 131, other electric devices such as, but not limited to, a brushless ac induction motor, etc. should be hermetically sealed in addition to the two filters, and thus may be sterilized together with the respiratory protection mask 100. In the first box 121, a silent, high-pressure and high-efficiency first centrifugal fan 123 is used for generating pressure; similarly, in the second box 131, a second centrifugal fan 133 with low noise, high pressure and high efficiency is also used to generate suction, thereby ensuring smooth air intake and exhaust processes of the mask.

Further, in this embodiment, the intake box assembly 120 further includes a first pressure sensor 129, the first pressure sensor 129 being disposed in the intake chamber and adjacent to the intake grill support 125; the outlet box assembly 130 further comprises a second pressure sensor 136, and the second pressure sensor 136 is disposed in the outlet chamber and between the second centrifugal fan 133 and the second filter 132.

The operation of the inlet box assembly 120 and the outlet box assembly 130 will be described in detail below with reference to the case where a doctor uses the respirator 100.

In the air inlet box assembly 120, a check valve may be provided to control the flow direction of the air flow; two first centrifugal fans 123 are arranged in the air inlet cavity, and of course, the number and arrangement of the first centrifugal fans can be set according to actual requirements; the first centrifugal fan generates pressure after rotating, air is driven to pass through the first filter sheet 122 for filtration and then enters the inlet cover, and the flow of the entering air is slightly larger than the normal breathing flow; when the first pressure sensor 129 senses that the pressure is increasing while the doctor exhales, the first centrifugal fan 123 responsible for air intake stops working, and when the pressure is sensing that the doctor exhales, the first centrifugal fan 123 responsible for air intake starts working until the next doctor exhales.

In the air outlet box assembly 130, a check valve may also be provided to control the flow direction of the air flow, and the second centrifugal fan 133 may be connected to a lithium battery or the like; when the second pressure sensor 136 senses that the doctor is exhaling, i.e., the pressure is increased, the second centrifugal fan 133 responsible for exhausting air starts to work, and when the doctor inhales air, the second centrifugal fan 133 does not work, so that the power is saved, and the doctor can be ensured to breathe fresh air smoothly. In addition, the inlet box assembly 120 or the outlet box assembly 130 may further be connected to a power connection 170, so that a portable and movable power source or power adapter such as a charger may be externally connected.

As shown in fig. 3, the air inlet box assembly 120 further includes a first air inlet fiber mat 126, a second air inlet fiber mat 127, and a porous insulating pad 128, wherein the first air inlet fiber mat 126 is disposed between the first filter 122 and the air inlet protective grille 124, the insulating pad 128 is sandwiched between the first air inlet fiber mat 126 and the first filter 122 to ensure that the first air inlet fiber mat 126 is not in contact with the first filter 122, and the second air inlet fiber mat 127 is disposed between the first filter 122 and the first centrifugal fan 123. Stainless steel frameworks which play a role in supporting and protecting the shape are arranged in the first air inlet fiber felt 126 and the second air inlet fiber felt 127, the first air inlet fiber felt 126 is connected with corresponding leads so as to have positive direct-current electrostatic voltage which is less than human body safety voltage, and the second air inlet fiber felt 127 is connected with corresponding leads so as to have negative direct-current electrostatic voltage which is less than human body safety voltage. The first air inlet fiber felt 126 and the second air inlet fiber felt 127 are specifically silver-containing stainless steel alloy or silver-plated stainless steel fiber felt, and can be disassembled for disinfection, and the fiber diameter of the fiber felt is smaller than 80 micrometers, so that the cost is low, the electrostatic corona discharge can be promoted, and the positive electrification strength of air impurities can be increased. It will be appreciated that the provision of the first and second inlet fiber mats 126, 127 may increase the effectiveness of the adsorption of pathogens due to the fact that impurities in the air, such as pathogens, are more positively charged.

Referring to fig. 1 and 2, in the present embodiment, the respiratory protection mask 100 further includes a straw 141 assembly 140, the straw 141 assembly 140 includes a hard straw 141 and a soft connecting pipe 142, one end of the straw 141 penetrates through the mask 110 and extends into the respiratory cavity 111, the other end of the straw 141 is hermetically connected to the connecting pipe 142, and a joint between the straw 141 and the mask 110 is hermetically disposed to prevent microorganisms from entering the respiratory cavity 111 through the pores. The straw 141 is preferably a transparent food grade plastic tube, although the straw 141 may be other colors. The straw 141 can extend to the mouth after extending into the mask 110, and the angle and position of the straw 141 can be kept by a sealed joint or a metal wire and the like to be convenient to adjust, so that the straw is more suitable for the size and height difference of the mouth. The connection pipe 142 is preferably a hose, and the length of the hose can be set according to actual requirements to facilitate operation.

Further, in this embodiment, the straw 141 assembly 140 further includes a leak-proof mouthpiece 143 and a sterile plug 144, the leak-proof mouthpiece 143 is connected to one end of the straw 141 extending into the breathing chamber 111, the sterile plug 144 is connected to the other end of the connecting pipe 142 away from the mask 110, and the sterile plug 144 is covered with a sterile protective cover to prevent microbial contamination. In practical use, the mineral water, the soda water, the milk, the soybean milk, the mashed fruit, the jam, the mashed vegetable, the chocolate paste and other beverages and semi-fluid food can be packaged in the storage bottle in advance, the joint of the storage bottle is also aseptic, the storage bottle can be rapidly and conveniently in aseptic connection with the aseptic plug 144 of the connecting pipe 142, and the storage bottle is slightly smaller than the aseptic protective cover attached to the connecting pipe 142. For convenient drinking, the storage bottle is preferably designed in a syringe or toothpaste tube type so as to safely squeeze beverage and food into the mouth and facilitate the mouth mask user such as medical staff to eat. Of course, the sterile connectors 144 of the storage bottle and the connecting tube 142 should be mutually matched in a sealing manner, so that the medical staff can safely eat or change different flavors of the fixed foods in a high-risk environment. In addition, can also set up buckle etc. on the storage bottle to make things convenient for medical personnel to fix between upper arm or waist, and then can vacate both hands and do more important thing.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A respiratory protection mask, comprising:

the mask is made of transparent materials, and the mask is surrounded with the face of a user to form a breathing cavity after being worn;

the air inlet box assembly is arranged on the mask and comprises a first box body, a first filter sheet and a first centrifugal fan, the first filter sheet and the first centrifugal fan are both arranged in the first box body, and the first centrifugal fan is arranged on the inner side, facing the mask, of the first filter sheet; and the number of the first and second groups,

the air outlet box assembly is arranged on the mask and is spaced from the air inlet box assembly, the air outlet box assembly comprises a second box body, a second filter sheet and a second centrifugal fan, the second filter sheet and the second centrifugal fan are both arranged in the second box body, and the second centrifugal fan is arranged on the outer side, away from the mask, of the second filter sheet;

the outside air enters the breathing cavity after being sequentially filtered by the first filtering piece and pressurized by the first centrifugal fan, and the air in the breathing cavity sequentially passes through the second filtering piece and the second centrifugal fan to be discharged from the second box body.

2. The respiratory protective mask of claim 1, wherein said inlet box assembly and said outlet box assembly are disposed on the left and right sides of said mask and adjacent to the outer edges of said mask.

3. The respiratory protection mask of claim 1, wherein said first shell is removably and sealingly connected to said mask and said first filter is removably mounted in said first shell; the second box body is also detachably and hermetically connected with the face mask, and the second filter sheet can be detachably arranged in the second box body.

4. The respirator as claimed in claim 2 wherein the first box has an air inlet chamber, an air inlet grille is provided on the outer panel of the first box, an air inlet grille support is provided on the face mask corresponding to the first box, the outer edge of the first filter is sealingly connected to the inner peripheral wall of the air inlet chamber and is adjacent to the air inlet grille, and the first centrifugal fan is disposed in the air inlet chamber and between the first filter and the air inlet grille support;

the second box body has the chamber of giving vent to anger, be equipped with the protection grid of giving vent to anger on the lateral plate of second box body, correspond on the face guard second box body department is equipped with the grid support of giving vent to anger, the outward flange of second cassette with go out the interior cliff side sealing connection in the chamber of giving vent to anger, and be close to give vent to anger the grid support, place in the second centrifugal fan in the chamber of giving vent to anger, and be located the second cassette with give vent to anger between the protection grid.

5. The respiratory protection mask of claim 4, wherein said air inlet box assembly further comprises a first air inlet fiber felt, a second air inlet fiber felt and a porous insulating spacer, said first air inlet fiber felt is disposed between said first filter sheet and said air inlet grille, said insulating spacer is sandwiched between said first air inlet fiber felt and said first filter sheet, said second air inlet fiber felt is disposed between said first filter sheet and said first centrifugal fan;

stainless steel frameworks are arranged in the first air inlet fiber felt and the second air inlet fiber felt, the first air inlet fiber felt is provided with positive direct-current electrostatic voltage smaller than human body safety voltage, and the second air inlet fiber felt is provided with negative direct-current electrostatic voltage smaller than human body safety voltage.

6. The respiratory protection mask of claim 4, wherein said inlet box assembly further comprises a first pressure sensor disposed in said inlet chamber and adjacent to said inlet grille support; the air outlet box assembly further comprises a second pressure sensor, and the second pressure sensor is arranged in the air outlet cavity and is positioned between the second centrifugal fan and the second filter sheet.

7. The respiratory protection mask of claim 1, further comprising a straw assembly, wherein the straw assembly comprises a hard straw and a soft connecting tube, one end of the straw is inserted into the mask and extends into the breathing cavity, the other end of the straw is hermetically connected with the connecting tube, and the connection between the straw and the mask is hermetically disposed.

8. The respiratory protection mask of claim 7, wherein said straw assembly further comprises a leak-proof mouthpiece and a sterile connector, said leak-proof mouthpiece being connected to one end of said straw extending into said breathing cavity, said sterile connector being connected to the other end of said connecting tube remote from said mask.

9. The respiratory protection mask of claim 1 wherein said mask has a sealing strip disposed on an inner side of said mask adjacent to an outer edge, said sealing strip having a length extending in a direction generally coincident with said outer edge of said mask.

10. The respiratory protection mask of claim 1 wherein said face shield is integrally formed of a transparent polycarbonate material.

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